Child-On-Lap Photo Composite

I have two separate photos—one of an adult seated and another of a child—that I need merged into a single, natural-looking image. The goal is to place the child on the adult’s lap, but positioned just a touch to the left rather than perfectly centered so it feels candid instead of staged. Once the figures are combined, please apply a tasteful background blur that keeps the focus on the subjects while retaining the original setting’s color palette and light direction.

Colour, lighting and shadow consistency are crucial; I want the finished photo to look as though it was taken in one shot. When everything aligns seamlessly, deliver a print-ready high-resolution JPEG (along with the layered PSD or equivalent source file so small tweaks are still possible on my end).